how to rotate the world nodes
I don't think you can move skyline in these. You can only control the movement of the sun/moon and other parameters.

because these are similar to hdri, you can't really control such things, however there is some add on I forgot it's name that can make any hdri into a half dome, so it will close to a mesh.
P.S: I wanted to comment in stead of an answer, but I don't have enough reputation yet. because I may be wrong.